Question

what is tonicity

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Answer 1

Tonicity is a measure of the effective osmotic pressure gradient; the water potential of two solutions separated by a semipermeable cell membrane. In other words, tonicity is the relative concentration of solutes dissolved in solution which determine the direction and extent of diffustion..

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Answer 2

It is the measure of effective osmotic pressure gradient ,it can be also defined as the relative concentration of solute dissolved in solution which determines the direction of diffusion